Painful neuralgias of the chest and abdominal wall usutaly respond well to root surgery, especially when the radicular level of the lesion is well defined. We could less invasively perform this procedure with percutaneous radiofrequency thermocoagulation technique instead of more invasive proecdure such as laminectomy and thus can treat the pain without significant sideeffeets. We did percutaneous radiofrequency thermocoagulation of the dorsaI root at the thoracic level ta treat our three patients with intractable chest and abdominal wall pain. The procedures were performed at the operation room with continuous monitoring of the blood pressure and electrocardiogram findings, and with the precise x-ray control of the needle position. The patients are now pain-free and have numbeness of the target dermatome without significant side-effects. The ease and simplicity of this technique may make it useful for treating intractable chronic or cance pain of chest and abdominal wall.